Don’t reinvent the wheel.

Cucumis is a basic implementation of cucumber's gherkin BDD plain-english testing language in node.js.

It was designed to meet the following criteria:

- Run in node.js (cucumber only supports v8 currently and not the node.js commonjs package system)
- Support asynchronous tests (cucumber only supports a synchronous system currently)

It was built upon the gherkin parser kyuri.

The easiest way to install cucumis is via the npm package manager:

npm install cucumis

- see cucumis in action with some web browser testing

Tests are written in cucumber's gherkin language.

Create a folder called 'features' under your current directory which contains your .feature files.

For example (addition.feature):

Feature: Addition In order to avoid silly mistakes As a math idiot I want to be able to add up numbers

```
Scenario: Add two numbers
Given I have a calculator
And I have entered 50 into the calculator
And I have entered 70 into the calculator
When I press add
Then the result should be 120 on the screen
```

Then run cucumis:

$ cucumis

You'll get the test results and a list of code snippets you'll need to implement to make the tests actually pass:

Feature: Addition In order to avoid silly mistakes As a math idiot I want to be able to add up numbers

Scenario: Add two numbers Given I have a calculator And I have entered 50 into the calculator And I have entered 70 into the calculator When I press add Then the result should be 120 on the screen

1 scenarios (1 passed, 1 undefined) 5 steps (5 undefined) 0m0.005s

You can implement step definitions for undefined steps with these snippets:

var Steps = require('cucumis').Steps;

Steps.Given(/^I have a calculator$/, function (ctx) { ctx.pending(); });

Steps.Given(/^I have entered (\d+) into the calculator$/, function (ctx, arg1) { ctx.pending(); });

Steps.When(/^I press add$/, function (ctx) { ctx.pending(); });

Steps.Then(/^the result should be (\d+) on the screen$/, function (ctx, arg1) { ctx.pending(); });

Steps.export(module);

Simply add the code snippets to a .js file (eg. addition.js) in the step_definitions folder beneath the features folder. For example:

var Steps = require('kyuri').Steps; var assert = require('assert');

var Calculator = function() { this._stack = []; };

Calculator.prototype = { enter: function (value) { this._stack.push(value); },

```
add: function() {
this._stack.push(this._stack.pop() + this._stack.pop());
},
subtract: function() {
this._stack.push(-(this._stack.pop() - this._stack.pop()));
},
result: function() {
return this._stack[this._stack.length - 1];
},
```

};

var calc;

Steps.Given(/^I have a calculator$/, function(ctx) { calc = new Calculator(); setTimeout(function() { ctx.done(); }, 10); });

Steps.Given(/^I have entered (\d+) into the calculator$/, function (ctx, value) { calc.enter(parseInt(value)); ctx.done(); });

Steps.When(/^I press add$/, function (ctx) { calc.add(); ctx.done(); });

Steps.Then(/^the result should be (\d+) on the screen$/, function (ctx, value) { assert.equal(calc.result(), parseInt(value)); ctx.done(); });

Steps.export(module);

Then run cucumis again:

Feature: Addition In order to avoid silly mistakes As a math idiot I want to be able to add up numbers

Scenario: Add two numbers Given I have a calculator And I have entered 50 into the calculator And I have entered 70 into the calculator When I press add Then the result should be 120 on the screen

1 scenarios (1 passed) 5 steps (5 passed) 0m0.017s

You can perform asynchronous tests like:

Steps.Given(/^I have a calculator$/, function(ctx) { calc = new Calculator(); setTimeout(function() { ctx.done(); }, 10); });

And by default, each step will need to complete in under 2 seconds otherwise a timeout error will be thrown.

Copyright 2010-2011 Noble Samurai

cucumis is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

cucumis is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with cucumis. If not, see http://www.gnu.org/licenses/.